Author Topic: The Fantastic Four: Shaft Attachment Methods  (Read 24 times)

tbbbearing

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The Fantastic Four: Shaft Attachment Methods
« on: September 14, 2017, 09:31:07 AM »
PTI proudly offers all four insert types for mounted ball bearings: Setscrew Locking, Eccentric Locking Collar, Concentric Clamp Collar and Tapered Adapter Sleeve. Understanding the features of each and the differences between them will help ensure you’re using the best shaft attachment method for you.

SETSCREW LOCKING
How it works: Two screws are tightened to clamp the bearing onto the shaft. Thecontact between the bearing and the shaft is concentrated on the opposite side of the setscrews. This is the most popular mounting method.
Note: Setscrews can cause significant fretting corrosion, making removal very difficult after years of operation.
ECCENTRIC LOCKING COLLAR
How it works: As the collar is twisted into place, it locks the bearing to the shaft. The contact of thebearing  is slightly more distributed than the setscrew locking method.
Note: These are unidirectional and are not intended for reversing loads. Like the setscrew method, the eccentric locking collar can cause significant fretting corrosion, making removal very difficult after years of operation.
CONCENTRIC CLAMP COLLAR
How it works: Tangs on the extended inner ring of the bearing lock down when the collar is twisted into place. The contact of the bearing is evenly distributed around a small ring around the shaft.
Note: This is a good method to use to minimize vibration.